CN113162482A - Method capable of automatically avoiding resonant frequency of variable frequency electric appliance - Google Patents
Method capable of automatically avoiding resonant frequency of variable frequency electric appliance Download PDFInfo
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- CN113162482A CN113162482A CN202110361558.2A CN202110361558A CN113162482A CN 113162482 A CN113162482 A CN 113162482A CN 202110361558 A CN202110361558 A CN 202110361558A CN 113162482 A CN113162482 A CN 113162482A
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- rotating speed
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- electric appliance
- gear
- variable frequency
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000001133 acceleration Effects 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000006870 function Effects 0.000 claims description 8
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a method capable of automatically avoiding resonant frequency of a variable frequency electric appliance, wherein an amplitude sensor is arranged on the variable frequency electric appliance or the motor, a control device controls a motor driving device to enable the motor to be gradually increased from low-gear rotating speed to high-gear rotating speed, an MEMS acceleration sensor detects vibration amplitude values corresponding to all rotating speeds and sends the vibration amplitude values to the control device, the average value of the vibration amplitude values of all rotating speeds is calculated, then whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than a numerical value A exists or not is judged, if the rotating speed exists, whether a gear with the difference value between the rotating speed and a preset gear rotating speed smaller than a numerical value B exists or not is judged, a rotating speed interval of the rotating speed +/-numerical value D is eliminated, and the rotating speed range of the motor in a memory is updated; if not, the control device uses the motor rotating speed range updated in the memory; therefore, the invention can avoid the resonant rotating speed interval, can reset the gear rotating speed and provides the user experience.
Description
[ technical field ]
The invention relates to a method capable of automatically avoiding resonant frequency of a variable frequency electric appliance.
[ background art ]
After the existing frequency conversion electric appliance containing the motor is assembled and installed, the frequency conversion electric appliance integrally has a natural frequency, the motor can generate vibration when rotating, and when the vibration frequency generated by the rotation of the motor is the same as or close to the natural frequency of the frequency conversion electric appliance integrally, resonance can be generated, so that the frequency conversion electric appliance can shake greatly, and bad noise and even integral damage can be caused; on the other hand, the inherent frequencies of the whole variable frequency electric appliance are different due to the difference of various components, assembly processes and installation and use environments of the product; in order to ensure the stable operation of the motor, the current common practice in the industry is to completely shield and abandon a section of large-range rotating speed interval near the inherent resonance point of a product, but the practice influences the use experience of a user.
[ summary of the invention ]
The invention overcomes the defects of the technology and provides a method capable of automatically avoiding the resonance frequency of a variable frequency electric appliance.
In order to achieve the purpose, the invention provides a method capable of automatically avoiding the resonant frequency of a variable frequency electric appliance, wherein the variable frequency electric appliance comprises a motor, an MEMS acceleration sensor 3 is arranged on the variable frequency electric appliance or the motor, and the method comprises the following steps:
step a, presetting gears and corresponding gear rotating speeds in a memory 5;
b, starting the frequency conversion electric appliance to avoid a resonance learning function, controlling the motor driving device 2 by the control device 4 to enable the motor 1 to be gradually increased from a low-gear rotating speed to a high-gear rotating speed, detecting vibration amplitude values corresponding to the rotating speeds by the MEMS acceleration sensor 3, and sending the vibration amplitude values to the control device 4;
step c, the control device 4 calculates the average value of the vibration amplitude values of the rotating speeds and judges whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than the numerical value A exists or not;
d, if yes, judging whether a gear with the difference value between the rotating speed and the preset gear rotating speed being smaller than the value B exists; otherwise, the control device 4 uses the preset gear and the corresponding gear rotating speed in the memory 5;
step e, if yes, judging whether the rotating speed is greater than the rotating speed of the preset gear;
step f, if the rotating speed is greater than the preset gear rotating speed, reducing the rotating speed value by a value C and updating and storing the value C as the gear rotating speed set value, and using the updated gear and the corresponding gear rotating speed in the memory 5 by the control device 4; if the rotating speed is not greater than the preset gear rotating speed, the rotating speed value is increased by a value C and is updated and stored as the gear rotating speed set value, and the control device 4 uses the updated gear and the corresponding gear rotating speed in the memory 5.
The method capable of automatically avoiding the resonant frequency of the variable frequency electric appliance is characterized by comprising the following steps of: and b, starting the variable frequency electric appliance to avoid the resonance learning function through a preset learning trigger device 6.
The method capable of automatically avoiding the resonant frequency of the variable frequency electric appliance is characterized by comprising the following steps of: the motor 1 is a brushless dc motor.
The method capable of automatically avoiding the resonant frequency of the variable frequency electric appliance is characterized by comprising the following steps of: the MEMS acceleration sensor 3 is arranged on the motor or the variable frequency electric appliance.
The invention also provides another method capable of automatically avoiding the resonant frequency of the variable frequency electric appliance, the variable frequency electric appliance comprises a motor, the MEMS acceleration sensor 3 is arranged on the variable frequency electric appliance or the motor, and the method comprises the following steps:
step a, presetting a motor rotating speed range in a memory 5;
b, starting the variable frequency electric appliance to avoid a resonance learning function, controlling the motor driving device 2 by the control device 4 to enable the motor 1 to be gradually increased from a low rotating speed to a high rotating speed, detecting vibration amplitude values corresponding to the rotating speeds by the MEMS acceleration sensor 3, and sending the vibration amplitude values to the control device 4;
step c, the control device 4 calculates the average value of the vibration amplitude values of the rotating speeds and judges whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than the numerical value A exists or not;
and D, if the current rotation speed range exists, eliminating the rotation speed interval of the rotation speed +/-numerical value D, updating the motor rotation speed range in the memory 5, and using the updated motor rotation speed range in the memory 5 by the control device 4.
The method capable of automatically avoiding the resonant frequency of the variable frequency electric appliance is characterized by comprising the following steps of: the motor 1 is a brushless dc motor.
Compared with the prior art, the invention has the following beneficial effects:
1. the vibration amplitude generated by the variable frequency electric appliance in each rotating speed state is detected through the acceleration sensor and is compared with the average value of the vibration amplitude, so that the rotating speed generating large vibration amplitude is selected to avoid, namely a resonant rotating speed interval is avoided;
2. meanwhile, the gear rotating speed value close to the selected rotating speed is changed and reset, so that the resonance frequency is avoided through frequency conversion speed regulation, and the influence on the use experience of a user due to resonance vibration of the frequency conversion electric appliance in the use process is avoided.
[ description of the drawings ]
FIG. 1 is a schematic view of the present invention.
[ detailed description of the invention ]
The following is a more detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings of which:
as shown in figure 1, when a variable frequency electric appliance is used for speed regulation in a gear speed regulation mode, the method can automatically avoid the resonant frequency of the variable frequency electric appliance, wherein the variable frequency electric appliance comprises a motor, and the method comprises the following steps:
step a, after the assembly of the variable frequency electric appliance is completed, presetting gears and corresponding gear rotating speeds in a memory 5;
b, after the installation of the variable frequency electric appliance is finished, starting the resonance avoidance learning function of the variable frequency electric appliance through a preset learning trigger device 6 button or a remote controller and the like, controlling the motor driving device 2 by the control device 4 to gradually increase the rotating speed of the motor 1 from a low gear to a high gear, detecting vibration amplitude values corresponding to all rotating speeds by the MEMS acceleration sensor 3 in the motor speed increasing process, and sending the vibration amplitude values to the control device 4;
step c, the control device 4 calculates the average value of the vibration amplitude values of the rotating speeds and judges whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than the numerical value A exists or not;
d, if the rotating speed with the difference value between the vibration amplitude value and the average value larger than the value A exists, judging whether a gear with the difference value between the rotating speed and the preset gear rotating speed smaller than the value B exists;
if the rotating speed with the difference value between the vibration amplitude value and the average value larger than the value A does not exist, the control device 4 uses a preset gear and a corresponding gear rotating speed in the memory 5;
step e, if a gear with a difference value between the rotating speed and the preset gear rotating speed smaller than the value B exists, judging whether the rotating speed is larger than the rotating speed close to the original preset gear;
step f, if the rotating speed is greater than the original preset rotating speed, reducing the rotating speed value by a value C and updating and storing the rotating speed value as a rotating speed set value of the gear, and then using the updated gear and the corresponding gear rotating speed in the memory 5 by the control device 4; if the rotating speed is not greater than the original preset rotating speed, the rotating speed value is increased by a value C and is updated and stored as the gear rotating speed set value, and then the control device 4 uses the updated gear and the corresponding gear rotating speed set value in the memory 5.
When the rotating speed with large vibration amplitude is close to the preset rotating speed of a certain gear, resetting the gear speed and storing the gear speed in the memory 5, and then driving the motor to work by the control device 4 through the motor driving device 2 by using the gear rotating speed of the memory 5; when the rotating speed with large vibration amplitude is not close to the rotating speeds of all preset gears, the control device 4 drives the motor 1 to work through the motor driving device 2 by using the gear rotating speed preset by the memory 5; thereby avoiding the resonance of the frequency conversion electric appliance.
When the variable frequency electric appliance is used for stepless speed regulation, a method capable of automatically avoiding the resonant frequency of the variable frequency electric appliance, wherein the variable frequency electric appliance comprises a motor, and the method comprises the following steps:
step a, presetting a motor rotating speed range in a memory 5;
b, starting the variable frequency electric appliance to avoid a resonance learning function, controlling the motor driving device 2 by the control device 4 to enable the motor 1 to be gradually increased from a low rotating speed to a high rotating speed, detecting vibration amplitude values corresponding to the rotating speeds by the MEMS acceleration sensor 3, and sending the vibration amplitude values to the control device 4;
step c, the control device 4 calculates the average value of the vibration amplitude values of the rotating speeds and judges whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than the numerical value A exists or not;
and D, if the current rotation speed range exists, eliminating the rotation speed interval of the rotation speed +/-numerical value D, updating the motor rotation speed range in the memory 5, and using the updated motor rotation speed range in the memory 5 by the control device 4.
Wherein, the motor 1 is a brushless DC motor; the MEMS acceleration sensor 3 is arranged on the motor or the frequency conversion electric appliance, the arrangement position of the MEMS acceleration sensor can be set according to the specific product structure, and the MEMS acceleration sensor is arranged at the position of the frequency conversion electric appliance which is easy to shake under the general condition.
Meanwhile, the control method for avoiding resonance of the variable frequency electric appliance can reset gear rotating speed after the variable frequency electric appliance is installed, and can learn the rotating speed of each gear again to continue normal use after the variable frequency electric appliance is used for a long time and under the condition that the variable frequency electric appliance greatly shakes, so that the use experience of a user is greatly improved, and severe shaking and noise are avoided.
Claims (7)
1. A method capable of automatically avoiding the resonant frequency of a variable frequency electric appliance, wherein the variable frequency electric appliance comprises a motor, is characterized by comprising the following steps:
step a, presetting gears and corresponding gear rotating speeds in a memory (5);
b, starting the frequency conversion electric appliance to avoid a resonance learning function, controlling the motor driving device (2) by the control device (4) to enable the motor (1) to be gradually increased from a low-gear rotating speed to a high-gear rotating speed, detecting vibration amplitude values corresponding to the rotating speeds by the MEMS acceleration sensor (3), and sending the vibration amplitude values to the control device (4);
step c, the control device (4) calculates the average value of the vibration amplitude values of the rotating speeds, and judges whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than the numerical value A exists or not;
d, if yes, judging whether a gear with the difference value between the rotating speed and the preset gear rotating speed being smaller than the value B exists; otherwise, the control device (4) uses the preset gear and the corresponding gear rotating speed in the memory (5);
step e, if yes, judging whether the rotating speed is greater than the rotating speed of the preset gear;
if the rotating speed is larger than the preset gear rotating speed, reducing the rotating speed value by a numerical value C and updating and storing the numerical value C as the gear rotating speed set value, and using the updated gear and the corresponding gear rotating speed in the memory (5) by the control device (4); if the rotating speed is not greater than the preset gear rotating speed, the rotating speed value is increased by a numerical value C and is updated and stored as the gear rotating speed set value, and the control device (4) uses the updated gear and the corresponding gear rotating speed in the memory (5).
2. The method for automatically avoiding the resonant frequency of the variable frequency electric appliance according to claim 1, wherein the method comprises the following steps: and in the step b, the variable frequency electric appliance is started to avoid the resonance learning function through a preset learning trigger device (6).
3. The method for automatically avoiding the resonant frequency of the variable frequency electric appliance according to claim 1, wherein the method comprises the following steps: the motor (1) is a brushless direct current motor.
4. The method for automatically avoiding the resonant frequency of the variable frequency electric appliance according to claim 1, wherein the method comprises the following steps: the MEMS acceleration sensor (3) is arranged on the motor or the variable frequency electric appliance.
5. A method capable of automatically avoiding the resonant frequency of a variable frequency electric appliance, wherein the variable frequency electric appliance comprises a motor, is characterized by comprising the following steps:
step a, presetting a motor rotating speed range in a memory (5);
b, starting the frequency conversion electric appliance to avoid a resonance learning function, controlling a motor driving device (2) by a control device (4) to enable a motor (1) to be gradually increased from a low rotating speed to a high rotating speed, detecting vibration amplitude values corresponding to the rotating speeds by an MEMS acceleration sensor (3), and sending the vibration amplitude values to the control device (4);
step c, the control device (4) calculates the average value of the vibration amplitude values of the rotating speeds, and judges whether the rotating speed with the difference value between the vibration amplitude values and the average value larger than the numerical value A exists or not;
and D, if the current rotation speed range exists, eliminating the rotation speed interval of the rotation speed +/-numerical value D, updating the motor rotation speed range in the memory (5), and using the updated motor rotation speed range in the memory (5) by the control device (4).
6. The method for automatically avoiding the resonant frequency of the variable frequency electric appliance according to claim 5, wherein the method comprises the following steps: the motor (1) is a brushless direct current motor.
7. The method for automatically avoiding the resonant frequency of the variable frequency electric appliance according to claim 5, wherein the method comprises the following steps: the MEMS acceleration sensor (3) is arranged on the motor or the variable frequency electric appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110361558.2A CN113162482A (en) | 2021-04-02 | 2021-04-02 | Method capable of automatically avoiding resonant frequency of variable frequency electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110361558.2A CN113162482A (en) | 2021-04-02 | 2021-04-02 | Method capable of automatically avoiding resonant frequency of variable frequency electric appliance |
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| CN113162482A true CN113162482A (en) | 2021-07-23 |
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| CN202110361558.2A Pending CN113162482A (en) | 2021-04-02 | 2021-04-02 | Method capable of automatically avoiding resonant frequency of variable frequency electric appliance |
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Citations (7)
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| US20070253089A1 (en) * | 2006-04-26 | 2007-11-01 | Hitachi Global Storage Technologies Inc. | Disk drive |
| CN105951359A (en) * | 2016-06-30 | 2016-09-21 | 无锡小天鹅股份有限公司 | Spin drying control method and device of washing machine and washing machine |
| CN105951360A (en) * | 2016-06-30 | 2016-09-21 | 无锡小天鹅股份有限公司 | Spin drying control method and device of washing machine and washing machine |
| CN108134555A (en) * | 2017-12-12 | 2018-06-08 | 青岛海尔空调器有限总公司 | The adjusting method and device of motor operation frequency |
| CN110726161A (en) * | 2019-10-08 | 2020-01-24 | 珠海格力电器股份有限公司 | Noise reduction control method and device for range hood, storage medium and range hood |
| CN111207915A (en) * | 2019-12-29 | 2020-05-29 | 苏州浪潮智能科技有限公司 | Test method and system for resonance avoidance tuning |
| CN111271849A (en) * | 2020-02-12 | 2020-06-12 | 广东美的制冷设备有限公司 | Fan control method, air conditioner and computer readable storage medium |
-
2021
- 2021-04-02 CN CN202110361558.2A patent/CN113162482A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070253089A1 (en) * | 2006-04-26 | 2007-11-01 | Hitachi Global Storage Technologies Inc. | Disk drive |
| CN105951359A (en) * | 2016-06-30 | 2016-09-21 | 无锡小天鹅股份有限公司 | Spin drying control method and device of washing machine and washing machine |
| CN105951360A (en) * | 2016-06-30 | 2016-09-21 | 无锡小天鹅股份有限公司 | Spin drying control method and device of washing machine and washing machine |
| CN108134555A (en) * | 2017-12-12 | 2018-06-08 | 青岛海尔空调器有限总公司 | The adjusting method and device of motor operation frequency |
| CN110726161A (en) * | 2019-10-08 | 2020-01-24 | 珠海格力电器股份有限公司 | Noise reduction control method and device for range hood, storage medium and range hood |
| CN111207915A (en) * | 2019-12-29 | 2020-05-29 | 苏州浪潮智能科技有限公司 | Test method and system for resonance avoidance tuning |
| CN111271849A (en) * | 2020-02-12 | 2020-06-12 | 广东美的制冷设备有限公司 | Fan control method, air conditioner and computer readable storage medium |
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Application publication date: 20210723 |